Mdadm changes appears Linux distro has changed?

I was running a rolling 1.2.0 version from mid 20180925 and it has been solid. I upgraded to 20190505 and noticed that when I try to do sudo su and check the software raid it can;t find it. I believe the Linux distro has changed and thus everything is different. I noticed when it is booting up it says it found the arry and 2 drives, but I used to access the old config

mdadm --detail /dev/md0

And even when I try and fond config it does not exist;

mdadm --detail --scan >> /etc/mdadm.conf

I have been trying to google the new ifo with no luck. Can anyone point me so some docs that tell me how to do this with the new distro?

Pulled submit too soon. Stumbled across an article telling me how to find the config file and read it.

Seems the upgrade changed the raid device from md0 to md127 and now the commands work!